// ferrysim.h
// ----------------------------------------------------------------------
//
// CSE 143
// Homework 4
// http://www.cs.washington.edu/education/courses/143/00su/homework/
// 21 Jul 2000, Ken Yasuhara


#ifndef _FERRYSIM_H_
#define _FERRYSIM_H_

#include <iostream.h>
#include <fstream.h>
#include "carqueue.h"
#include "ferrysimeventlist.h"

// The following class forward is needed because classes FerrySimView and 
// FerrySim reference each other.
class FerrySimView; 


const int CAR_TICKETING_TIME = 2;
const int CAR_BOARDING_TIME = 1;

const int FARE_PER_CAR_WITH_DRIVER = 6;
const int FARE_PER_ADDITIONAL_PASSENGER = 2;


class FerrySim {
public:
  // carDataFile should contain car arrival events; assoc. w/ carDataStream
  // ferryDataFile should contain ferry schedule; assoc. w/ ferryDataStream
  FerrySim(const char carDataFile[], const char ferryDataFile[]);

  // deletes any remaining Car, Ferry instances
  ~FerrySim();

  // start simulation
  void run();

  // compute cost of ticket for this car and its passengers
  int computeFare(const Car *carPtr) const;

  // statistics; for visualization
  int getCurrentTime() const { return currentTime; }
  int getFerryDepartureCount() const { return ferryDepartureCount; }
  int getTotalTicketRevenue() const { return totalTicketRevenue; }

  // for visualization
  const CarQueue &getTicketingQueue() const { return ticketingQ; }
  const CarQueue &getBoardingQueue() const { return boardingQ; }

  bool isFerryDocked() const { return (dockedFerryPtr != NULL); }
  int getDockedFerryDepartureTime() const { return dockedFerryDepartureTime; }

private:
  // reads next car arrival from carDataStream, adds it to event list; 
  // returns true if new arrival event added to list;
  // allocates a Car instance
  bool generateCarArrival();

  // reads ferry arrival from ferryDataStream, adds it to event list; 
  // returns true if new arrival event added to list;
  // allocates a Ferry instance
  bool generateFirstFerryArrival();

  // based on arrival time of currently docked ferry and ferry's time 
  // between arrivals, adds ferry arrival event to event list
  void generateNextFerryArrival();

  // adds event for given car (should be first in ticketingQ) 
  // to be ticketed
  void generateCarTicketing(Car *carPtr);

  // adds event for given car (should be first in boardingQ)
  // to board ferry currently at dock
  bool generateCarBoarding(Car *carPtr);

  // adds event for currently docked ferry to depart
  void generateFerryDeparture();

  // processCarBoarding deletes Car instance
  // processFerryDeparture deletes a Ferry instance
  void processCarArrival(const FerrySimEvent &event);
  void processCarTicketing(const FerrySimEvent &event);
  void processFerryArrival(const FerrySimEvent &event);
  void processCarBoarding(const FerrySimEvent &event);
  void processFerryDeparture(const FerrySimEvent &event); 


  // 
  // internal representation
  // 

  ifstream carDataStream, ferryDataStream;
  
  int currentTime;

  CarQueue ticketingQ;
  CarQueue boardingQ;
  FerrySimEventList eventList;

  Ferry *dockedFerryPtr;
  int dockedFerryDepartureTime;

  // statistics
  int ferryDepartureCount;
  double averageCapacityBoarded;
  int totalTicketRevenue;  // in dollars

  // graphical visualization
  FerrySimView *viewPtr;

  // toggle debugging text 
  bool debugOutput;
};


#endif // _FERRYSIM_H_